I haven't heard the Merlin's or Thiel's but as a Dyn C1 owner all I can say the C1's are a great speaker for the type of music you listen to. Very natural and smooth (some may say a little laid back). Also as Mechans stated the amp is also part of the equation. I had a Bryston B100SST rated at 180 w/ch into 4 ohms which I thought sounded pretty darn good. Then I demoed an Octave V70SE tube integrated (in my home) rated at 70 w/ch into 4 ohm. The Octave just destroyed the Bryston in every way. With the Octave I can roll tubes to change the sound without having to buy new electronics or cables :).
Another speaker you may want to consider would be the Sonus Faber Creamora Auditor M. But at the same MSRP the Dyn C1's sounded much better to ME.
Good luck
Another speaker you may want to consider would be the Sonus Faber Creamora Auditor M. But at the same MSRP the Dyn C1's sounded much better to ME.
Good luck